v0.1.0 initial commit

inline/progress.go

@@ -0,0 +1,49 @@
+//go:build unix
+
+package inline
+
+import "strings"
+
+// BarBlock is the default bar character set [filled, partial, empty]
+var BarBlock = [3]rune{'█', '▌', '░'}
+
+// Bar renders an unstyled progress bar of width cells, pct in [0,1]
+func Bar(width int, pct float64, chars [3]rune) string {
+	if width < 1 {
+		return ""
+	}
+	if pct < 0 {
+		pct = 0
+	}
+	if pct > 1 {
+		pct = 1
+	}
+	filled := int(float64(width) * pct)
+	rem := float64(width)*pct - float64(filled)
+
+	var b strings.Builder
+	b.Grow(width * 3) // Worst-case UTF-8
+	for i := range width {
+		switch {
+		case i < filled:
+			b.WriteRune(chars[0])
+		case i == filled && rem >= 0.5 && filled < width:
+			b.WriteRune(chars[1])
+		default:
+			b.WriteRune(chars[2])
+		}
+	}
+	return b.String()
+}
+
+// Braille frames; intentionally duplicated from tui (no tui dependency)
+var spinnerFrames = [...]string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}
+
+// Spinner returns the frame for a monotonic counter
+func Spinner(frame int) string {
+	i := frame % len(spinnerFrames)
+	if i < 0 {
+		i = -i
+	}
+	return spinnerFrames[i]
+}